Universal features of terahertz absorption in disordered materials

被引：86

作者：

Taraskin, S. N.

Simdyankin, S. I.

Elliott, S. R.

Neilson, J. R.

Lo, T.

机构：

[1] Univ Cambridge St Catharines Coll, Cambridge CB2 1RL, England

[2] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[3] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

[4] Teraview Ltd, Cambridge CB4 0W5, England

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.97.055504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using an analytical theory, experimental terahertz time-domain spectroscopy data, and numerical evidence, we demonstrate that the frequency dependence of the absorption coupling coefficient between far-infrared photons and atomic vibrations in disordered materials has the universal functional form, C(omega)=A+B omega(2), where the material-specific constants A and B are related to the distributions of fluctuating charges obeying global and local charge neutrality, respectively.

引用

页数：4

共 26 条

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